Question

因此，我有一个voteTotal变量，该变量将计算总共7个州的选举人票数。但是，数字在第二列的不同行上，但是我不确定如何添加第二列的选举人票。第一栏是州名，第二栏是选举人总数。

我真的不知道如何调用行，因此我很难在每行的同一列2上添加正确的行2-8。

int voteTotal = 0;
int stateNumOne = 0;
int stateNumTwo = 0;
int stateNumThree = 0;
int stateNumFour = 0;
int stateNumFive = 0;
int stateNumSix = 0;
int stateNumSeven = 0;

if (votesListView.Items.Count < 1)
{
    MessageBox.Show("List View can not be empty.");
}
if (votesListView.Items[0].SubItems[1] != null)
{
    stateNumOne = int.Parse(votesListView.Items[0].SubItems[1].Text);
    MessageBox.Show("1");
}
if (votesListView.Items[1].SubItems[1] != null)
{
    stateNumTwo = int.Parse(votesListView.Items[1].SubItems[1].Text);
    MessageBox.Show("2");
}
else if (votesListView.Items[2].SubItems[1] != null)
{
    stateNumThree = int.Parse(votesListView.Items[2].SubItems[1].Text);
}

/*
stateNumSix = int.Parse(votesListView.Items[6].SubItems[
stateNumFour = int.Parse(votesListView.Items[4].SubItems[1].Text);
stateNumFive = int.Parse(votesListVie1].Text);
stateNumSeven = int.Parse(votesListView.Items[7].SubItems[1].Text);
*/

voteTotal = stateNumOne + stateNumTwo + stateNumThree + stateNumFour + stateNumFive + stateNumSix + stateNumSeven;
totalLabel.Text = voteTotal.ToString();
totalVotesLabel.Visible = true;
totalLabel.Visible = true;

Answer 1

我不确定这是否是您要尝试的方法，但是此帖子Xamarin.Forms: Get all cells/items of a listview的第一个答案听起来像您应该做的事情。

您应该使用数据绑定并使用它来获取数据。您不应该直接触摸单元格/项目。

但是再说一遍，您的问题本身有点含糊。希望对您有所帮助。

Answer 2

是否要获得以下截图所示的结果？

这里是布局。

  <ListView  x:Name="listView" ItemsSource="{Binding MyModels} ">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <Grid >
                        <Grid.RowDefinitions>
                            <RowDefinition Height="*" />

                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>

                        <Label Grid.Row="0" Grid.Column="0" Text="{Binding State}"
                            />
                        <Label Grid.Row="0" Grid.Column="1" Text="{Binding Votes}"

                           />
                    </Grid>


                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>

这是背景代码。

  BindingContext = new MyViewModel();

这里是MyViewModel

的代码

 class MyViewModel
{
    public ObservableCollection<MyModel> MyModels { get; set; }
    public MyViewModel()
    {
        MyModels = new ObservableCollection<MyModel>();
        MyModels.Add(new MyModel() { State = "State Name", Votes = "Electoral Votes" 
        });
        MyModels.Add(new MyModel() { State = "Oregon ", Votes = "7" });
        MyModels.Add(new MyModel() { State = "Washington", Votes = "8" });
        MyModels.Add(new MyModel() { State = "California", Votes = "55" });
        MyModels.Add(new MyModel() { State = "lost1", Votes = "22" });
        MyModels.Add(new MyModel() { State = "lost2", Votes = "24" });
        MyModels.Add(new MyModel() { State = "lost3", Votes = "25" });
        MyModels.Add(new MyModel() { State = "lost4", Votes = "26" });
        MyModels.Add(new MyModel() { State = "lost5", Votes = "27" });

        int sumVotes = 0;
        for (int i=1;i<MyModels.Count;i++)
        {
            sumVotes+= Int32.Parse(MyModels[i].Votes);
        }
        MyModels.Add(new MyModel() { State = " ", Votes = 
        "sum"+sumVotes.ToString()});



    }
}

此处是MyModel的ID码

     public class MyModel
{
    public string State { get; set; }
    public string Votes { get; set; }
}

Answer 3


int voteTotal = 0;
int secondcolumn = 1;

    enter code here

if (votesListView.Items.Count < 1)
    MessageBox.Show("List View can not be  empty.");
else
    {
    for(int spot = 0; spot < votesListView.Items.Count; spot++)
        {
        voteTotal += int.Parse(votesListView.Items[spot].SubItems[secondcolumn].Text);
        //This will pop up a MessageBox at each iteration of this for loop.
        //feel free to comment out the MessageBox if it doesn't work.
        //you can also print out the voteTotal after the for loop.
        MessageBox.Show(spot.ToString());
        }
    }

c＃listview添加第二列行数据

3 个答案: